Pressure-regulator.



Patented Mar. 29; 1910.

'IIIIIIII/II/IIIIIIII W/ TALE $656) STATES rArN'r OFFICE.

HEINRICH KRIIGER, 0F BERLIN, GERMANY.

Specification of Letters Patent. Patented M31. 29, 1910,

Application filed December 18, 1909. Serial No. 533,813.

To all whom it may concern:

Be it known that I, HEINRICH Knr'io'nn, a citizen of the Empire ofGermany, residing at Berlin, in the Empire of Germany, have inventedanew and useful Pressure- Regulator, of which the following is aspecification.

In the known safety devices with vertical pipes for regulating thepressure in steam oilers the pipe is usually em tied entirely on thepressure exceeding the i hest limit, the sealing liquid being expellefrom the pipe by the pressure and thrown to without,

whereupon the pressure in the boiler will rapidly sink very much belowthe normal working pressure, so that it takes up very much time, beforethe working pressure in the boiler is reestablished.

My invention relates to improvements in such safety-devices, whereby thesaid defect is avoided.

The improved pressure-regulator acting as asafety-device consists of twovessels one above the other, and of several vertical pipes of differentlengths and diameters connecting the two vessels. The lower vessel isclosed and is connected with the upper vessel by a siphon, while it isadapted to be connected with the steam space of the respectivesteamboiler. The several vertical pipes extend into the upper vessel up tothe same height above its-bottom, while they, on the contrary, extendinto the closed lower vessel to different depths. The upper vessel has anarrow mouth above and is rovided with means for preventing the sea inliquid from being thrown to without, mg the siphon serves for returninthe sealin liquid expelled upward throug any vertica pipe by the steampressure from the upper vessel to the lower vessel, whereby the normalworking pressure in the boiler is quickly reestablished.

I will now proceed to describe my invention with reference to theaccompanying drawing, in which- Figure 1 is a vertical longitudinalsection through the pressure-regulator, and Fig. 2

is a horizontal cross section through the same on the line AB, inFig. 1. v

Similar letters of reference refer to similar arts in both views.

T e pressure regulator essentially consists of two vessels e and 9,several (here four) vertical pipes a, b, c and d air-tightl connectingthe two vessels, and a siphon little increased. The steam ma The pipesa, b, c, and d are shown to be different in length and also in area. Allof them extend into the upper vessel 9 to the same height above itsbottom, but they extend into the lower vessel e to decreasing ,depths asshown. The siphon It connects the lower vessel 6 just above its bottomwith the upper vessel 9 at its bottom. The upper vessel 9 is shown to beprovided with a conical roof 2? sup orted by a few suitable brackets Zat a sma 1 height above the upper ends of the pipes a, b, c and d. Abovethe annular opening between the roof 5 and the inside of the vessel 9 anannular horizontal rib m is dis osed'and is shown to be cast in one witht e vessel 9. Preferably the rib m is inclined inwardly and downwardly,as shown. The lower vessel e is to be,connected by a suitably bent pipe1 with the steam space of the respective steam boiler, where a smallpressure is to be maintained, such as is for example the case withboilers for heating plants.

When th boiler is cold, the sealing liquid introduced into the lowervessel 6 Wlll have the same level in the latter, the pipes a, b, c

and (Z, and the siphon h, which level may be about at the same height.as the line A--B' the difference between the two levels, de-

termines the pressure in the boiler. When the pressure in the boilerrises, 1t Wlll. force the level of the liquid in the lower vessel 0farther downward, until the lower end of.

the pi e dis uncovered and the steam is permitte to enter the pipe 01,when it will expel the liquid therein upward and escape through themouth is in the direction of the arrow. The liquid expelled is caught bythe roof 2', so that it flows into the upper vessel g. Any spurtingliquid will be caught by the rib m and returned downward. he liquid willcollect on the bottom of the upper vessel g, whereby the head of theliquid is a continue to escape through the pipe d unti its pressure hassunk to the normal size. If, however, the pressure in the boiler furtherrises, the

lower end of the-second pipe 0 will be uncovered, so that steam canenter it and expel from it the liquid contained in it, after which thesteam passes through it upward. It may be preferable to make the secondpipe 0 smaller in area than the first'pipe (Z,

-so as to prevent the pressure of the steam retard as much as possiblethe emptying of I the vessel e through the siphon h. The liquid expelledfrom the several pipes d, c, b, and collecting in the upper vessel 9 ispermitted to return through the siphon h to 'the lower vessel 6 on thesteam pressure falling to normal. It will be seen, that by thisarrangement of the pressure regulator all disturbances in'themanagementof the respective plant are avoided as far as is possible.

I have shown the level of the sealing liquid in the tubes and siphon tobe normally at the sameheight as the bottom of the 11 per vessel 9, butI desire it expressly to pndprstood, that I do not bind myself to thiseve The pressure regulator can be varied in many "respects withoutdeparting from the spirit of my invention.

The several vertical pipes a, b, a, d may be made alike in area, ortheir areas may increase or decrease in any selected order.

,I claim: p

1. In a pressure regulator of the class described, the combination witha lower closed vessel adapted to be connected with the steam space of aboiler, of an upper vessel open at the top, a plurality of verticalpipes air-tightly connecting said lower vessel with said upper vesseland extending into the upper vessel to the same height above the bottom,but extending into the lower vessel to different depths, and a siphonconnecting said lower vessel at its bottom with said upper vessel at itsbottom.

2. Ina pressure regulator of the class described, the combination with alower closed vessel adapted to be connected with thesteam space of aboiler, of an upper vessel with a narrow mouth at the top, a pluralityof vertical pipes air-tightly connecting said lower vessel with saidupper vessel and extending into the upper vessel tothe same height abovethe bottom, but extending into the lower vessel to diflerent depths, asiphon connecting said lower vessel at its bottom with said uppervessel. at its bottom, a seal-' ing liquid in said lower vessel, andmeans in said upper vessel adapted to catch any sealing liquid expellelfrom the lower vessel through any vertical pipe by the steam pressure.

HEINRICH KRUGER.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER.

